Jungle Vaporeon #28: PSA 9 vs PSA 10
Jungle Vaporeon #28 shows a wide gem-mint premium between PSA 9 and PSA 10: a $162 dollar gap, with the gem mint multiplier at 3.9x. Based on the last tracked PSA 10 sale of $255.00 on Feb 13, 2026, the math leans toward holding the 9: expected value turns negative at conservative upgrade probabilities once the resub fee is in.
PSA 10
$217.50
Last sale $255.00 on
PSA 9
$56.00
Last sale $60.00 on
PSA 8
$33.00
Last sale $33.00 on
The Spread
The PSA 9 to PSA 10 spread on Vaporeon #28 Jungle.
$162
Dollar gap, PSA 9 to PSA 10
3.9x
PSA 10 sells for 3.9x a PSA 9
Three-Outcome EV Calculator
15%
70%
15%
Defaults are conservative starting points. Adjust based on the specific slab. A borderline 9 with strong centering plays differently than a 9 with edge wear.
PSA 10 outcome (sale price minus resub minus acquisition)
$0
PSA 9 outcome (regrade, no upgrade)
$0
PSA 8 outcome (downgrade, slower sell, tied capital)
$0
Expected Value
$0
Math favors holding the 9
Jungle #28 Vaporeon released in 1999 sits in the vintage WOTC tier where gem-mint premiums above $162 are common. PSA 10 populations shrink faster than supply on cards of this era, which is why the upgrade arbitrage stays alive.
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